linux-kernel - Re: [PATCH V2 1/2] mm: move FAULT_AROUND

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 04 Apr 2014 13:50:56 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	dave.hansen@...el.com
Cc:	maddy@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-mm@...ck.org,
	linux-arch@...r.kernel.org, x86@...nel.org,
	benh@...nel.crashing.org, paulus@...ba.org,
	kirill.shutemov@...ux.intel.com, rusty@...tcorp.com.au,
	akpm@...ux-foundation.org, riel@...hat.com, mgorman@...e.de,
	ak@...ux.intel.com, peterz@...radead.org, mingo@...nel.org
Subject: Re: [PATCH V2 1/2] mm: move FAULT_AROUND_ORDER to arch/

From: Dave Hansen <dave.hansen@...el.com>
Date: Fri, 04 Apr 2014 09:18:43 -0700

> On 04/03/2014 11:27 PM, Madhavan Srinivasan wrote:
>> This patch creates infrastructure to move the FAULT_AROUND_ORDER
>> to arch/ using Kconfig. This will enable architecture maintainers
>> to decide on suitable FAULT_AROUND_ORDER value based on
>> performance data for that architecture. Patch also adds
>> FAULT_AROUND_ORDER Kconfig element in arch/X86.
> 
> Please don't do it this way.
> 
> In mm/Kconfig, put
> 
> 	config FAULT_AROUND_ORDER
> 		int
> 		default 1234 if POWERPC
> 		default 4
> 
> The way you have it now, every single architecture that needs to enable
> this has to go put that in their Kconfig.  That's madness.  This way,
> you only put it in one place, and folks only have to care if they want
> to change the default to be something other than 4.

It looks more like it's necessary only to change the default, not
to enable it.  Unless I read his patch wrong...
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/